Senior Desmond Bozeman will anchor the middle and the team's best tackler Johnnie Simon will move into the box to help. There is an opportunity for a player to earn the third starting job in the Broncos' new 4-3 system, but it seems as if the expected starting lineup entering fall camp is set.

The concern with this group is depth: Where is it going to come from?

Here's what you can expect to see Sunday:

OUTSIDE LINEBACKER

Johnnie Simon

Starter: Johnnie Simon (6-0, 200), Senior. Simon has been the Broncos' leading tackler the last two seasons with 103 stops last season and 114 tackles in 2011. Simon has been a superb open field tackler from his role as a rover in recent years and there is little doubt Simon can succeed as a linebacker. However, a move to linebacker is a big jump.

Backup: Trevor Ishmael (6-1, 200), Junior. Ishmael spent some time at linebacker in the spring and got some important snaps with the first team when Brant went down. Ishmael is listed as a strong safety, but he has a nose for the football and stands his ground.

MIDDLE LINEBACKER

Desmond Bozeman

Starter: Desmond Bozeman (6-0, 220), Senior. Bozeman was an anchor at linebacker last season. He played in and started 11 games. he finished with 90 tackles, four sacks, one interception and one forced fumble which he picked up and returned 53 yards for a touchdown to secure a win over UConn last season. Bozeman missed most of the spring due to a minor injury, but coach P.J. Fleck said in the spring the linebacker would be ready for the season.

Backup: Caleb Bailey (5-11, 221), Freshman. This is arguably the biggest concern on the depth chart at the linebacker position. Bailey has good size and comes in as a three-star recruit, but if forced to play would he be able to handle the atmosphere? Seniors Jake Minster (6-2, 235) and Kyle Lark (6-0, 230) could also be possibilities here.

OUTSIDE LINEBACKER

Kyle Lark

Starter: Kyle Lark (6-0, 230), Senior. Easmon would have been the starter here had he not gone down with a knee injury in the spring, but naming Lark the replacement starter heading into fall camp makes sense. He has game experience and proved last year he could be effective when filling in for Paul Hazel. Lark played in 12 games last season and started six games. He finished with 46 tackles and one sack.

This position could also be filled by Michigan transfer linebacker Mike Jones. Jones was mainly a special teams player for the Wolverines, but Fleck said in the offseason Jones would step in on day one as the starting linebacker. Fall camp will sort all of this out.

Backup: Austin Lewis (6-3, 215), Freshman. Lewis, a three-star recruit, has game-ready size. How quickly he can catch up to the speed of the college game and the intricacies of WMU's scheme will say a lot about his playing opportunities. Trevor Ishmael and Jake Minster could also be possibilities here.

KEY RESERVES

Fleck had a smile on his face when talking about Austin Lewis' potential and game-readiness. Seeing freshmen playing in the front seven of WMU's defense is a realistic possibility this season. Freshman Edward Rolle (6-2, 190) is another youngster to keep an eye on in camp. Rolle scored two defensive touchdowns as a senior at Carol City High School (Fla.) last season. Keion Adams, a 6-3, 230-pound freshman from Salisbury, N.C. could also see the field.